Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Common Stock Warrant [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2011	$ 278,127	$ 36,641	$ 127	$ 878	$ 135,825	$ 3,997	$ 148,010	$ (47,351)
Net income	18,664						18,664
Other comprehensive income	277					277
Stock option expense	104				104
Shares issued under stock option plan	4						(4)	8
Restricted share activity under stock incentive plans	146				116			30
Shares issued direct purchases	14				1			13
Preferred stock dividends accrued	(900)						(900)
Accretion on preferred shares	0	359					(359)
Shares purchased in Treasury auction	(15,942)	(16,560)					618
Shares purchased in open market	(20,416)	(20,440)					24
Common stock dividends declared	(1,950)						(1,950)
Balance at Dec. 31, 2012	258,128	0	127	878	136,046	4,274	164,103	(47,300)
Net income	22,235						22,235
Other comprehensive income	(3,729)					(3,729)
Stock option expense	44				44
Shares issued under stock option plan	350				(34)		(97)	481
Restricted share activity under stock incentive plans	783				327		(44)	500
Shares issued direct purchases	64				20			44
shares repurchased	(1,821)							(1,821)
Common stock dividends declared	(3,907)						(3,907)
Balance at Dec. 31, 2013	272,147	0	127	878	136,403	545	182,290	(48,096)
Net income	24,292						24,292
Other comprehensive income	3,569					3,569
Stock option expense	78				78
Shares issued under stock option plan	921				88		(45)	878
Restricted share activity under stock incentive plans	(122)				(334)			212
Shares issued direct purchases	76				31			45
shares repurchased	(15,519)							(15,519)
Common stock dividends declared	(5,937)						(5,937)
Balance at Dec. 31, 2014	$ 279,505	$ 0	$ 127	$ 878	$ 136,266	$ 4,114	$ 200,600	$ (62,480)